module main;  // Computes average line length for standard input.
import std.stdio;
struct Mystruct {
  int eight = 8;
  int get() { return 9; }
}
class Myclass {
  static this() { writeln("Myclass object constructed."); } // a static constructor
  static ~this() { writeln("Myclass object destroyed."); }  // a static destructor
  Mystruct astruct;
  alias astruct this;
}
int sctest() {
  auto aclass = new Myclass;
  int i = aclass.eight; // i == 8
  i = aclass.get(); // i == 9
  delete aclass;
  return i;
}
void main() {
    ulong all_lines = 0;
    double movingAverage = 0;
    sctest();   // some OOP
    writeln("Enter records and see the moving average of record lengths after each go <cr> exits");
    foreach (line; stdin.byLine()) {
        ++all_lines;
        movingAverage = ((movingAverage * (all_lines - 1)) + line.length) / all_lines;
        writeln("Average record length: ", movingAverage);
    }
}